Housing for a thermostatic switch



FIG. 1 is a top, front, left side perspective view of a housing for a thermostatic switch showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevation thereof;

FIG. 4 is a bottom plan view thereof;

FIG. 5 is a rear elevation thereof;

FIG. 6 is a front elevation thereof. 

The ornamental design for housing for a thermostatic switch, substantially as shown and described. 